<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<style media="screen">
    * {
        padding: 0;
        margin: 0;
    }
    img{
        /* display:block; */
        /* margin: 0 auto; */
        max-width: 100%;
        /* max-height: calc(100vh / 3); */
        /* flex: 0 0 30%; */
        flex-shrink: 0;
        flex-basis: 1;
    }
    #box {
        width: 100%;
        display:flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        height: 100vh
    }
</style>
<body>
    <div id="box">
        <img src="https://via.placeholder.com/2000x1000" alt="">
        <img src="https://via.placeholder.com/100x100" alt="">
        <img src="https://via.placeholder.com/300x1000" alt="">
    </div>
</body>
</html>
